2005

7.4

2006

7.0

2011

6.6

1978

3.4

2008

5.9

1985

7.2

2009

6.0

1980

6.7

2009

8.5

2021

7.7

2007

6.4

1960

7.5

2016

6.7

2002

6.6

1983

5.5

2013

5.8

1995

5.6

2015

6.3

1998

6.0

2010

7.3